Fix default posy for watermark image

Author: bep

layouts/partials/gallerydeluxe/create-thumbs.html

@@ -12,7 +12,7 @@
     {{ $watermarkWidth := $watermark.Width }}
     {{ $watermarkHeight := $watermark.Height }}
     {{ $posx :=  $opts.posx | default "right" }}
-    {{ $posy := $opts.posy | default "botton" }}
+    {{ $posy := $opts.posy | default "bottom" }}
     {{ $padding := 20 }}
     {{ $x := $padding }}
     {{ $y := $padding }}